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RF2498
0
Typical Applications • CDMA/Cellular/PCS/GPS Handsets • JCDMA/GPS Handsets • CDMA Modem/Data Cards Product Description
-A5.00 SQ.
TRI-BAND/QUAD-MODE CDMA/GPS LOW NOISE AMPLIFIER/MIXER
• Commercial and Consumer Systems • Portable Battery-Powered Equipment
0.10 C A
2 PLCS
The RF2498 is a high performance CDMA tri-band/quadmode integrated LNA/mixer with GPS capability. The device is designed to meet all IS-98 sensitivity, intermodulation and single-tone requirements. The RF2498 integrates the tri-band LNA/downconverters with 27.5dB of gain control for the cellular band and 29dB for the PCS band. The RF2498 is designed for three state gain control solutions for IS-98 IMD testing. The device offers a dedicated GPS LNA/mixer with 37dB of gain. Additionally, a divide-by-2 prescaler to allow the use of either a single- or dual-band VCO is integrated. There is also a TX LO buffer. The design is flexible, in that the bias currents may be set using off-chip current reference resistors for the mixer and LNA blocks. The device is packaged in a plastic, 5mmx5mm, leadless chip carrier. Optimum Technology Matching® Applied
Si BJT Si Bi-CMOS InGaP/HBT GaAs HBT SiGe HBT GaN HEMT GaAs MESFET Si CMOS SiGe Bi-CMOS
0.90 0.85 0.05 0.00
0.05 C
2.50 TYP
0.10 C B
2 PLCS
0.70 0.65
Dimensions in mm.
12° MAX
0.10 C B
2 PLCS
-B2.37 TYP 4.75 SQ.
0.10 C A
2 PLCS
SEATING PLANE
-C0.10 M C A B
NOTES: 1. Shaded lead is Pin 1. 2 Dimension applies to plated terminal: to be measured between 0.20 mm and 0.25 mm from terminal end.
0.60 0.24 TYP
0.30 2 0.18
PIN 1 ID 0.20 R
3.25 SQ. 2.95 0.50 0.30
0.50
Package Style: QFN, 32-Pin, 5x5
Features • GPS Receive Front-End Gain=37dB • Meets IMD Tests with Three Gain States/Two Logic Control Lines • Adjustable Mixer and LNA Bias Current • Selectable Divide-by-2 Prescaler • Integrated TX LO Buffer Amplifier
GPS MIX IN
32 GPS+ 1
31
30
29
28
27
26
25 24 GPS LNA IN
GPS LNA OUT 23 PCS LNA IN 22 IP SET 21 PCS LNA OUT 20 CELL LNA IN 19 CELL LNA EMITTER
BAND SEL
GPS- 2
CDMA+ 3
CDMA- 4
FM+ 5
/2
FM- 6
IF SEL
ISET3
ISET2
ISET1
VCC1
VCC2 7
18 CELL LNA OUT
Ordering Information
RF2498 RF2498 PCBA Tri-Band/Quad-Mode CDMA/GPS Low Noise Amplifier/Mixer Fully Assembled Evaluation Board Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com
LO IN 8 9 LO OUT 10 /2 SELECT 11 TX BUFF ENABLE 12 PCS RFA VCC 13 PCS MIX IN 14 CELL MIX IN 15 MIX GAIN 16 ENABLE
17 LNA GAIN
Functional Block Diagram
RF Micro Devices, Inc. 7628 Thorndike Road Greensboro, NC 27409, USA
Rev A3 030711
8-301
RF2498
Absolute Maximum Ratings Parameter
Supply Voltage Input LO and RF Levels Operating Ambient Temperature Storage Temperature
Rating
-0.5 to +5.0 +6 -40 to +85 -40 to +150
Unit
VDC dBm °C °C
Caution! ESD sensitive device.
RF Micro Devices believes the furnished information is correct and accurate at the time of this printing. However, RF Micro Devices reserves the right to make changes to its products without notice. RF Micro Devices does not assume responsibility for the use of the described product(s).
Parameter
Overall
RF Frequency Range
Specification Min. Typ. Max.
800 to 900 1500 to 2200 1575.42 0.1 2.65 1.8 2.75 400 3.15 0.4 10
Unit
MHz MHz MHz MHz V V V µA
Condition
T = 25°C, VCC =2.75V
GPS band
IF Frequency Range
Power Supply
Supply Voltage Logic High Logic Low Power Down Current
Cellular Band JCDMA Band
LNA (On)
Gain Noise Figure Input IP3 Current Isolation +9.0 +5.0 13.5 13.0 15.0 14.5 1.1 1.0 +11.0 +9.0 6.5 4.5 23 -2.5 2.5 +25.0 0 2.5 16.5 16.0 1.3 1.2 dB dB dB dB dBm dBm mA mA dB dB dB dBm mA dB
ENABLE=0 Freq=869MHz to 894MHz Freq=832MHz to 870MHz LNA 50Ω match IPSET=1 IPSET=0 IPSET=1 IPSET=0 IPSET=1 IPSET=0 IPSET=1 IPSET=0
LNA (Off)
Gain Noise Figure Input IP3 Current Isolation -4.0 +20.0 -1.8 4.0
Mixer - CDMA/JCDMA
Gain Noise Figure Input IP3 Current LO to RF Isolation LO Frequency Range IF Frequency Range 36 600 0.1 183.6 2300 400 +1.0 +11.0 11.5 1.5 13.0 3.0 7.5 14.0 +3.5 +13.0 18.5 13.5 14.5 4.5 8.5 16.0 dB dB dB dB dBm dBm mA mA dB dB MHz MHz
LO IN=-4dBm See note 1 and 2. Mixer Preamp ON Mixer Preamp OFF Mixer Preamp ON Mixer Preamp OFF Mixer Preamp ON Mixer Preamp OFF Mixer Preamp ON/Mixer/LO Input Amps Mixer Preamp OFF/Mixer/LO Input Amps Mixer Preamp ON Mixer Preamp OFF High and Low Side LO Injection. See note 3 and 4. Typical IF frequencies: 85.38MHz, 109.80MHz, 111.85MHz, 183.6MHz
8-302
Rev A3 030711
RF2498
Parameter Cellular Band JCDMA Band, cont’d
Mixer - FM
Gain Noise Figure Input IP3 Current LO to RF Isolation LO Frequency Range IF Frequency Range 36 600 0.1 183.6 2300 400 +1.5 +11.0 11.5 1.5 13.0 3.0 7.5 14.0 +3.5 +14.0 18.5 13.5 14.5 4.5 8.5 16.0 dB dB dB dB dBm dBm mA mA dB dB MHz MHz LO IN=-4dBm See note 1 and 2. Mixer Preamp ON Mixer Preamp OFF Mixer Preamp ON Mixer Preamp OFF Mixer Preamp ON Mixer Preamp OFF Mixer Preamp ON/Mixer/LO Input Amps Mixer Preamp OFF/Mixer/LO Input Amps Mixer Preamp ON Mixer Preamp OFF High and Low Side LO Injection See note 3 and 4. Typical IF frequencies: 85.38MHz, 109.80MHz, 111.85MHz, 183.6MHz
Specification Min. Typ. Max.
Unit
Condition
Other
LO-IF Isolation RF-IF Isolation LNA Out to Mixer In Isolation LO-LNA In Isolation, Any State 30 40 40 35 dB dB dB dB Freq=1930MHz to 1990MHz Freq=1840MHz to 1870MHz 13.5 13.0 15.5 15.0 1.5 1.4 +12.0 +4.0 6.5 4.5 20 -4 4 +26.0 0 4 17.5 16.5 1.8 1.7 dB dB dB dB dBm dBm mA mA dB dB dB dBm mA dB LO IN=-4dBm See note 1. Mixer Preamp ON Mixer Preamp OFF Mixer Preamp ON Mixer Preamp OFF Mixer Preamp ON Mixer Preamp OFF Mixer Preamp ON/Mixer/LO Input Amps Mixer Preamp OFF/Mixer/LO Input Amps Mixer Preamp ON Mixer Preamp OFF High and Low Side LO Injection Typical IF frequencies: 183.6MHz, 210.38MHz, 220.38MHz LNA 50Ω match IPSET=1 IPSET=0 IPSET=1 IPSET=0 IPSET=1 IPSET=0 IPSET=1 IPSET=0
US PCS Band Korean PCS Band
LNA (On)
Gain Noise Figure Input IP3 Current Isolation +8.0 -2.0
LNA (Off)
Gain Noise Figure Input IP3 Current Isolation -6 +20.0 6
Mixer
Gain Noise Figure Input IP3 Current LO to RF Isolation LO Frequency Range IF Frequency Range 36 30 1600 0.1 +1.5 +11.0 12.0 2.5 14.0 4.5 7.0 15 +5.0 +13.0 19.0 14.0 15.5 6.5 8.5 17 dB dB dB dB dBm dBm mA mA dB dB MHz MHz
183.6
2400 400
Rev A3 030711
8-303
RF2498
Parameter
Other
LO-IF Isolation RF-IF Isolation LNA Out to Mixer In Isolation LO-LNA In Isolation, Any State 36 40 30 35 dB dB dB dB Freq=1575.42MHz 17.0 16 19.0 18 1.3 1.25 +5.0 -1.0 6.5 4.5 20 dB dB dB dB dBm dBm mA mA dB LNA 50Ω match IPSET=1 IPSET=0 IPSET=1 IPSET=0 IPSET=1 IPSET=0 IPSET=1 IPSET=0 LO IN=-4dBm See note 1. 16 18 5.5 7.0 -5.5 15.5 1800 0 400 dB dB dB dBm mA dB MHz dBm MHz High Side LO Injection. Low Side LO Injection. Preamp/Mixer/LO Input Amps High and Low Side LO Injection Typical IF frequencies: 183.6MHz, 210.38MHz, 220.38MHz
Specification Min. Typ. Max.
Unit
Condition
40
GPS Band
LNA (On)
Gain Noise Figure Input IP3 Current Isolation +1.0 -5.0
1.7 1.7
Mixer
Gain Noise Figure Input IP3 Current LO to RF Isolation LO Frequency Range LO Input Power Range IF Frequency Range
-7.5
1350 -10 0.1
-4 183.6
Other
LO-IF Isolation RF-IF Isolation LNA Out to Mixer In Isolation LO-LNA In Isolation, Any State 36 40 30 35 dB dB dB dB 1 pF BAND SEL, IF SEL, IP SET, LNA GAIN, ENABLE, MIX GAIN, TX BUFF ENABLE, /2 SELECT
40
Control Lines
Input Capacitance
Local Oscillator Input
Cellular - CDMA/FM/JCDMA Input Power Input Frequency PCS Input Power Input Frequency GPS Input Power Input Frequency -10 600 1200 -10 1600 -10 1350 -4 0 1078 2156 0 2300 0 1800 dBm MHz MHz dBm MHz dBm MHz See note 3. High and Low side injection. See note 4. High and Low side injection.
-4
High and Low Side LO Injection.
-4
High and Low Side LO Injection.
8-304
Rev A3 030711
RF2498
Parameter TX (Local Oscillator) Buffer
Cellular - CDMA/FM/JCDMA Output Power -11 -8 dBm Output Frequency 600 1078 MHz Output Power -11 -6.5 Output Frequency 1200 2156 MHz Current Consumption 2 mA PCS Output Power -11 -8 dBm Output Frequency 1600 2300 MHz Current Consumption 2 mA NOTE 1. Mixer performance can be changed with external IF load/tuning. NOTE 2. Specifications apply for conditions of LO Divider enabled or disabled. NOTE 3. LO Divider disabled. LO Divider disabled logic conditions: A) BAND SELECT=1; /2 SELECT=Immaterial.B) BAND SELECT=0; /2 SELECT=1 NOTE 4. LO Divider enabled. LO Divider enabled logic conditions: A) BAND SELECT=0; /2 SELECT=0 Single-ended 50Ω load See note 3. High and Low Side LO Injection. Single-ended 50Ω load See note 4. High and Low Side LO Injection.
Specification Min. Typ. Max.
Unit
Condition
Single-ended 50Ω load High and Low Side LO Injection
Rev A3 030711
8-305
RF2498
Evaluation Board Current Measurement
BAND SEL CDMA CellularHigh IIP3 LNA Mode* LNA On, Mixer Preamp On, TX Buffer Off, /2 Off LNA On, Mixer Preamp Off, TX Buffer Off, /2 Off LNA Bypassed, Mixer Preamp On, TX Buffer Off, /2 Off LNA Bypassed, Mixer Preamp Off, TX Buffer Off, /2 Off FM/JCDMALow Current LNA Mode LNA On, Mixer Preamp On, TX Buffer Off, /2 Off LNA On, Mixer Preamp Off, TX Buffer Off, /2 Off LNA Bypassed, Mixer Preamp On, TX Buffer Off, /2 Off LNA Bypassed, Mixer Preamp Off, TX Buffer Off, /2 Off CDMA PCS High IIP3 LNA Mode* LNA On, Mixer Preamp On TX Buffer Off, /2 Off* LNA On, Mixer Preamp Off TX Buffer Off, /2 Off* LNA Bypassed, Mixer Preamp On TX Buffer Off, /2 Off LNA Bypassed, Mixer Preamp Off TX Buffer Off, /2 Off GPS LNA On, Mixer On IF SEL ENABLE LNA GAIN MIX GAIN IP SET TX BUFF ENABLE /2 SELECT IDC (mA)
0 0 0 0
1 1 1 1
1 1 1 1
1 1 0 0
1 0 1 0
1 1 X X
0 0 0 0
1 1 1 1
27.0 22.0 20.5 15.5
0 0 0 0
0 0 0 0
1 1 1 1
1 1 0 0
1 0 1 0
0 0 X X
0 0 0 0
1 1 1 1
25.0 20.0 20.5 15.5
1 1 1 1
1 1 1 1
1 1 1 1
1 1 0 0
1 0 1 0
1 1 X X
0 0 0 0
1 1 1 1
27.5 25.5 21.0 16.0
1
0
1
X
X
0
0
X
24.0
NOTES: All IDC current numbers include bias circuitry current of 1.5mA to 2.0mA (dependent on mode). TX B
